Lock-nut



L. J. SCHNELL.

LOCK NUT.

APPLICATION FILED NOV.26. 1919.

1 ,352,090, PatentedSept. 7, 1920.

IN V EN TOR dam/43W ATTORNEY Wires stares LAWRENCE J. SCHNELL, 0F PORTLAND, OREGON.

LOCK-NUT.

Application filed November 26, 1919.

T 0 all whom it may concern Be it hereby known that I, LAWRENCE J. SoHNnLL, a citizen of the country of Russia, (who has declared his intention of becoming a citizen the Unitcc Staten) and a resident of *ortland, in the county of Multno mob and St to of Oregon, have invented a new and use Lock-Nut, or" which the following is a specification.

My invention relates more par a means for preventing the rota direction of a nut upon its bolt.

The object of my invention is to provide an exceedingly simple and efiicient lock nut which is capable of being locked or unlocked by a simple movement of a pin.

It attain these objects in the manner set forth in the specifications following and illustrated in the accompanying drawing, in which: Figure '1 is a plan of a nut showing the device in the unlocked position; ig. 2 is similar to Fig. 1 except in the locked position; Fig. 3 is an elevation with a per-- tion broken away to show the working parts of my device along the line 33 in 2,

Similar numbers or reference refer to the same or similar parts throughout the several views.

Referring in detail to the drawing: The numeral represents the usual hexagonal hea l nut mounted on the bolt 5. The smallest internal diameter 01 the nut dis represented by the numeral 6 and the root of the thread as 7. A short section of thread 8 is attached to a curved wire 9 and is adapted to be wcd ed against the curved surface 10 and the root of the thread of the bolt 5. channel 11 is formed in the nut -l in a manner to receive the curved wire 9 whose bent end 13 may be latched in the recess 14c at the end of the channel 9 or the recess 12. A spring 15 mounted on the wire 9 and hearing on the end 16 of the interior wall of the channel 9 tends to hold the section of thread 8 into a wedged position. Retaining screw 17 serves to hold the wire 9 in place.

operation of my device is as toilows: When it is not desired to use the nut as a locked nut the bent end 13 is latcl'led into the recess which hoids the spring 15 compression and the 4 ticularly to tion in one to use it Specification of Letters Patent. Patanted SQPE. '3 18 20.

Serial No. 340,852.

serves to hold the bent end 13 or the wire 9 when the nut is not attached to a bolt.

It will be evident that the greater the strain placed on the nut e the greater the wed-ging action against the member 8 and no damage to the threads can result therefrom inasmuch as the strain is delivered to the root of the thread instead of at its point.

.Vhile I have thus illustrated and de scribed my invention it is not my desire to limit myself to this precise form or method of application, but intend that it shall cover forms and modifications that fall fairly ithin the appended claims.

ii hat I claim as new and desire to protect y Letters Patent of the United states, is:

l. A lock nut having a portion oi one thread cut away and a sliding section of thread put in its place in a manner that rotation of the nut in one direction will wedge said section of thread between the nut and the bolt, and a reverse rotation will carry said thread out or its wedging position.

2. A lock nut having a curved recess formed in a face of said nut with its curved portion forming a tangent with the root oi said thread in said nut, a curved wall formed on the side of said recess adjacent to the thread, a section of thread adapted to be wedged between said curved side of the recess and the bolt member, a wire slide for said wedge and attached thereco, a coil spring member mounted on said wire slide and adapted to force said wedge member into a wedgin position, a means for holding sa member out or position consisting it a cent end on said wire slide, and a recess in said nut adapted to receive said bent end, a means for preventing the escape or said wire when the nut is not on a bolt, consisting of a second recess in said bolt positioned to one consisting of a counter sunk bolt whose head is adapted. to cover a portion of slid-wire slide member.

3. A locking device for nuts consisting of a wedge adapted to be held between a recess in the nut member and the root of the thread on its bolt member a Wire slide means adapted to guide and retain said Wedge member, a bent end 011 said Wire slide member, and a spring adapted to hold said 10 wedge member into engagement with the bolt member.

LAWRENCE J. SCHNELL. 

